automatic closed-loop control
61Galvanometer — D Arsonval/Weston galvanometer movement with the moving coil shown in red. A galvanometer is a type of ammeter: an instrument for detecting and measuring electric current. It is an analog electromechanical transducer that produces a rotary… …
62Criticism of Facebook — Facebook s growth as an Internet social networking site has met criticism on a range of issues, including online privacy, child safety, and the inability to terminate accounts without first manually deleting the content. In 2008, many companies… …
63Timeline of Islamic science and engineering — This timeline of Islamic science and engineering covers the general development of science and technology in the Islamic world during the Islamic Golden Age, usually dated from the 7th to 16th centuries.From the 17th century onwards, the advances …
64Cadillac Sedan de Ville — deVille and De Ville redirect here. For other uses, see Deville. Cadillac de Ville Manufacturer General Motors Production 1949–2005 …
65TARDIS — The TARDIS used from 2005 to 2010 on display at BBC Television Centre …
66Fast fuel system — A Fast fuel system allows speedy refuelling of vehicles. Most large earthmoving and mining vehicles with diesel fuel tanks over 150 U.S. gallons (568 liters) are equipped with fast refueling systems. Fast refueling systems utilize an automatic… …
67Chuck (engineering) — Self centering three jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws… …
68Adjustable-speed drive — (ASD) or variable speed drive (VSD) describes equipment used to control the speed of machinery. Many industrial processes such as assembly lines must operate at different speeds for different products. Where process conditions demand adjustment… …
69Mechanical ventilation — In architecture and climate control, mechanical or forced ventilation is the use of powered equipment, e.g. fans and blowers, to move air  see ventilation (architecture). Mechanical ventilation Intervention …
70Track circuit — A track circuit is a simple electrical device used to detect the presence or absence of a train on rail tracks, used to inform signallers and control relevant signals. Principles and operation The basic principle behind the track circuit lies in… …
